Ultimately from either Ancient Greek -ισμός (-ismos), a suffix that forms abstract nouns of action, state, condition, doctrine; from stem of verbs in -ίζειν (-izein) (whence English -ize), or from the related suffix Ancient Greek -ισμα (-isma), which more specifically expressed a finished act or thing done.
Many English nouns in -ism are loans of Greek nouns in -ισμός (mostly via Latin and French), such as baptism from βαπτισμός (loaned from Old French ca. 1300), or Judaism from Ἰουδαισμός (a learned English formation based on Latin, coined ca. 1500). In Late Latin, the -ismus suffix became the ordinary ending for names of religions and ecclesiastical or philosophical systems or schools of thought, thus chrīstiānismus (whence 16th c. Christianism) in Tertullian, a trend continued in Medieval Latin, with e.g. pāgānismus attested by the 8th century. From the 16th century, such formations became very common in English, until the early 18th century mostly restricted to either root words of Greek or Latin origin (heroism, patriotism) or proper names (Calvinism, Lutheranism). Productivity from root words with evidently non-Latin and non-Greek origin dates to the late 18th century (e.g. blackguardism). Reflecting this productivity, use of ism as a standalone noun is attested by Edward Pettit (1680) and becomes common from the mid 18th century. The narrowed sense of forming terms for ideologies based on the belief of superiority is a "draft addition" submitted to OED in 2004, based on coinages such as racism (1932) or sexism (1936) and productive since the 1970s.
- Used to form nouns of action or process or result based on the accompanying verb in -ize.
- Used to form the name of a system, school of thought or theory based on the name of its subject or object or alternatively on the name of its founder ((when de-capitalized, these overlap with the generic "doctrines" sense below, e.g. Liberalism vs. liberalism):).
- Used to form names of a tendency of behaviour, action or opinion belonging to a class or group of persons; the result of a doctrine, ideology or principle.
- atheism (1587), ruffianism (1589), giantism (1639), fanaticism (1652), theism (1678), religionism (1706), patriotism (1716), heroism (1717), despotism (1728), old-maidism (1776), capitalism (1792), nationism (1798), romanticism (1803), conservatism (1832), sexualism (1842), externalism (1856), young-ladyism (1869), opportunism (1870), blackguardism (1875), jingoism (1878), feminism (1895), dwarfism (1895)
- Used to form nouns indicating a peculiarity or characteristic of language
- Used to form names of ideologies expressing belief in the superiority of a certain class within the concept expressed by the root word, or a pattern of behavior or a social norm that benefits members of the group indicated by the root word. ((based on a late 20th-century narrowing of the "terms for a doctrine" sense):)
- (medicine) Used to form names of conditions or syndromes caused by or associated with a specific type of organism
- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.
- Oxford English Dictionary, s.v. "-ism, suffix".
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